分类: science

  • Polar bear mother adopts cub in rarely documented case

    Polar bear mother adopts cub in rarely documented case

    Scientists conducting field research in northern Canada have documented an extraordinary behavioral phenomenon among polar bears during their annual migration near Churchill, Manitoba. A five-year-old female bear was observed caring for an additional cub that was not biologically her own, marking only the 13th confirmed case of adoption in nearly fifty years of scientific observation involving 4,600 bears.

    The mother bear was initially captured and tagged emerging from her maternity den in spring with a single cub, which researchers marked for identification. When researchers resighted the bear during the fall migration along the Western Hudson Bay, they discovered she was accompanied by two cubs—the originally tagged offspring and an untagged newcomer.

    Alyssa McCall, a scientist with Polar Bears International, characterized the behavior as highly unusual, noting that the scientific community has limited understanding of why such adoptions occur given their extreme rarity. Researchers are currently attempting to identify the adoptive cub’s biological mother through genetic analysis, though her fate remains unknown.

    Evan Richardson, a polar bear specialist with Environment and Climate Change Canada, emphasized the significance of this behavior in the context of climate challenges facing the species. With polar bears facing increasing environmental pressures, adoptive caregiving potentially enhances cub survival rates—particularly important given that wild polar bears only have a 50% chance of reaching adulthood.

    The adopted cub appears healthy and will likely remain with its new family until approximately two-and-a-half years of age. The bear family is expected to proceed to sea ice habitats where the mother will teach both cubs essential survival skills, including seal hunting techniques necessary for independent living.

    Researchers view this rare display of interspecific caregiving as a potentially adaptive behavior that could benefit polar bear population resilience in changing Arctic conditions.

  • Alliance of Open Life Science expands global reach with new membership invitations

    Alliance of Open Life Science expands global reach with new membership invitations

    The Alliance of Open Life Science has embarked on a significant global expansion initiative by extending membership invitations to 32 prestigious universities and research institutions worldwide. This development was announced during the alliance’s 2025 annual conference, which commenced in Guangzhou on Monday.

    Among the distinguished institutions receiving invitations are the University of Oxford and Imperial College London, representing a major step in China’s commitment to advancing international collaboration in life sciences. The alliance, an international non-profit academic community formed voluntarily by universities and research institutions, has already received positive responses from several invitees.

    The current gathering includes representatives from the alliance’s existing 33 member institutions. Academic leadership presented key developments, with CAS academician Jin Li, President of Fudan University, delivering the alliance’s work report. CAS academician Shi Yigong, President of Westlake University, outlined the development strategy for the alliance’s scientific journal.

    Addressing the critical needs of what it termed the ‘big science era,’ the alliance emphasized that global cooperation is essential for tackling fundamental questions about life origins and health mysteries. The organization is dedicated to establishing a worldwide innovation network and cooperation mechanism to drive breakthroughs across life science research, technological advancement, talent development, and industrial innovation.

    The conference also marked the induction of the alliance’s second cohort of new members. Since its establishment in August with 15 founding members—including Peking University, Tsinghua University, Fudan University, and Hong Kong University of Science and Technology—the alliance has grown to incorporate 18 additional institutions, now encompassing China’s premier life science research organizations.

    Guided by the principle that science transcends national boundaries, the alliance commits to developing high-quality public goods and promoting open science development in life sciences and technology for the benefit of human society worldwide.

  • Chinese research named among Physics World’s top 10 breakthroughs of 2025

    Chinese research named among Physics World’s top 10 breakthroughs of 2025

    In a landmark achievement for materials science, Chinese researchers have earned global recognition for creating the world’s first two-dimensional metals, an accomplishment long considered nearly unattainable. This groundbreaking work, led by a team at the Institute of Physics under the Chinese Academy of Sciences, has been selected among Physics World’s prestigious “Top 10 Breakthroughs for 2025.”

    The research, published in the renowned journal Nature in March 2025, represents a quantum leap in materials science that could potentially propel the next stage of human technological advancement. Since the discovery of monolayer graphene in 2004, 2D materials have fundamentally transformed scientific understanding of material properties and driven unprecedented innovations in condensed-matter physics.

    According to Professor Zhang Guangyu, the project’s lead scientist, creating 2D metals presented extraordinary challenges due to the strong metallic bonds between atoms that occur in all directions. “The metallic bonding nature made conventional approaches to 2D material synthesis ineffective,” Zhang explained. “We had to fundamentally rethink material fabrication at the atomic level.”

    The research team pioneered an innovative atomic-scale manufacturing technique called the van der Waals squeezing method, which enabled the creation of diverse 2D metals including bismuth, tin, lead, indium, and gallium. These ultra-thin materials measure just one millionth the thickness of a standard A4 paper sheet and approximately one 200,000th the diameter of a human hair.

    The implications of this breakthrough extend across multiple technological domains. These novel 2D metals could revolutionize numerous industries through ultra-micro low-power transistors, high-frequency communication devices, transparent display technology, ultra-sensitive detection systems, and highly efficient catalytic processes.

    Physics World, the flagship publication of the Institute of Physics (the professional body for physics in the UK and Ireland), annually recognizes achievements that demonstrate significant scientific importance, advance the frontiers of knowledge, and attract broad attention from the global physics community. The selection criteria emphasize rigorous scientific validation, seamless integration of theory and experiment, and profound implications for future research and applications.

  • Cluster of ancient stone city sites found in Yulin

    Cluster of ancient stone city sites found in Yulin

    Archaeologists have made a groundbreaking discovery in Northwest China’s Shaanxi province, unearthing a vast network of 573 ancient stone cities that date back approximately 4,800 to 3,800 years. This extraordinary find, resulting from six years of intensive survey work in the Yulin region, fundamentally reshapes our understanding of early Chinese civilization patterns and challenges long-held historical paradigms.

    The newly discovered urban centers, constructed between 2800 BC and 1000 BC, represent the largest and most sophisticated prehistoric stone city complex ever identified in northern China. According to Ma Mingzhi, associate researcher of Yulin’s cultural relics and archaeological survey team, these findings dramatically surpass previous records—before this survey, fewer than 200 prehistoric city sites had been documented nationwide, with only several dozen being stone constructions.

    The architectural sophistication reveals a clearly stratified society with hierarchical urban planning principles. Higher-status inhabitants occupied central zones with more complex defensive walls, while outer areas housed those of relatively lower status. These settlements, strategically positioned along riverbanks, served multiple functions including military defense, residential settlement, and religious ritual. The Shimao site features particularly remarkable stone carvings depicting divine faces, dragons, and snakes, alongside noble burial grounds and structures believed to be ancestral temples.

    This discovery effectively dismantles the traditional ‘Central Plains-centric theory’ of Chinese civilization development, demonstrating that northern Shaanxi served as a crucial cultural hub during the early Xia Dynasty (c. 21st-16th century BC). The scale of urbanization—with over 600 stone cities now identified across Shaanxi, Inner Mongolia, Shanxi, and Hebei provinces—corroborates ancient literary references to an ‘era of ten thousand states’ that historians previously considered potentially fictional.

    Professor Han Jianye from Renmin University of China notes that the construction timeline coincides with the legendary Yellow Emperor era, suggesting the region served as both a cultural core and a defensive prototype for what would eventually become the Great Wall. The sites demonstrate clear evolutionary progression, with settlements expanding in scale, spatial layouts growing more complex, and construction techniques advancing significantly over centuries of continuous use.

    Future research will focus on environmental support systems, handicraft production, regional economic development, and genetic analysis of population movements. These investigations promise to illuminate the material foundations that sustained this remarkable urban network and its interactions with contemporary ethnic groups, potentially rewriting our understanding of state formation processes in ancient East Asia.

  • ‘Land does not lie’: Sharjah Ruler cites 200,000-year-old tools as Faya joins Unesco list

    ‘Land does not lie’: Sharjah Ruler cites 200,000-year-old tools as Faya joins Unesco list

    SHARJAH – In a landmark ceremony at the Mleiha Archaeological Centre, His Highness Sheikh Dr. Sultan bin Muhammad Al Qasimi, Ruler of Sharjah, formally celebrated the inscription of the Faya archaeological site onto the UNESCO World Heritage List. The event marked international recognition of a location that has fundamentally altered scientific comprehension of early human migration patterns.

    The significance of Faya was underscored by the unveiling of a commemorative monument and the presentation of the official inscription certificate by Lazare Eloundou Assomo, Director of the UNESCO World Heritage Centre. Sheikh Dr. Sultan emphasized that this designation transcends regional importance, representing instead a profound contribution to humanity’s collective historical narrative.

    Central to Faya’s global value are the extraordinary discoveries made there, including exquisitely crafted stone tools dating back more than 200,000 years. These artifacts have effectively dismantled long-standing assumptions, providing compelling evidence that modern humans inhabited the Arabian Peninsula far earlier than previously documented. ‘The land spoke, and the land does not lie when it speaks through science,’ stated the Ruler, reflecting on the moment researchers realized they were confronting evidence that recalibrates the timeline of human settlement.

    Sheikh Dr. Sultan articulated Faya’s role as more than a transit corridor, establishing it as a crucial early homeland where human communities demonstrated remarkable adaptation to arid environments. The site offers a continuous record of human presence, ingenuity, and social organization over hundreds of millennia. He described Faya as ‘living pages of the book of humanity’ that illustrate how early societies transformed environmental challenges into knowledge, cooperation, and sustainable resource management.

    Beyond its archaeological importance, the Sharjah Ruler framed heritage preservation as an essential investment in cultural identity and future wisdom. He asserted that protecting sites like Faya safeguards accumulated human experience, providing ‘an open school for generations’ to understand their origins and contextualize their role in contemporary society. This philosophy aligns with Sharjah’s broader cultural vision, where heritage occupies a central position in understanding the region’s social foundations.

    The UNESCO recognition solidifies the United Arab Emirates’ growing role in global heritage conservation while highlighting how Arabian Peninsula discoveries are reshaping historical paradigms regarding civilization development through communication networks and adaptive strategies that remain relevant to modern challenges.

  • Massive sauropod discovered in Chongqing

    Massive sauropod discovered in Chongqing

    Paleontologists have identified a colossal new dinosaur species that roamed the terrain of present-day Chongqing approximately 160 million years ago during the Late Jurassic period. The monumental discovery, formally classified as Mamenchisaurus sanjiangensis, was detailed in a groundbreaking study published in the prestigious journal Scientific Reports.

    The fossilized remains were originally unearthed in 2015 within Chongqing’s Hechuan district, a region situated at the convergence of the Jialing, Fujiang, and Qujiang rivers—a geographic feature that inspired the species’ nomenclature. With an estimated body length reaching 24 meters, comparable to the dimensions of a modern blue whale, this sauropod represents one of the most substantial dinosaur specimens ever recovered from the municipality.

    Research led by Dai Hui of the Chongqing Institute of Paleontology revealed that although the newly identified species shares close phylogenetic relationships with Mamenchisaurus hochuanensis, meticulous analysis of skeletal structures confirmed its distinct taxonomic status. The remarkably preserved fossil assemblage includes an extensive series of cervical, dorsal, and caudal vertebrae, alongside pelvic elements and portions of the left limb.

    This significant paleontological breakthrough emerged from the Upper Shaximiao Formation, a stratigraphic layer renowned for yielding numerous iconic Chinese dinosaur discoveries. The excavation and subsequent analysis mark a substantial advancement in Chongqing’s paleontological capabilities, providing crucial insights into sauropod diversification across East Asia during the Jurassic era. Mamenchisaurus sanjiangensis constitutes the eleventh novel dinosaur species identified in China throughout 2024, elevating Chongqing’s confirmed dinosaur species tally to fifteen.

  • A photographer finds thousands of dinosaur footprints near Italian Winter Olympic venue

    A photographer finds thousands of dinosaur footprints near Italian Winter Olympic venue

    Italian officials revealed on Tuesday that a wildlife photographer has unearthed one of the most extensive known collections of dinosaur footprints, dating back approximately 210 million years to the Triassic Period. The remarkable discovery occurred in Stelvio National Park, adjacent to Bormio—the designated Alpine skiing venue for the 2026 Milan Cortina Winter Olympics.

    Experts expressed astonishment at both the quantity and location of the findings. The trackway spans roughly five kilometers (three miles) along the Swiss border region, containing an estimated 20,000 individual footprints in an area previously unknown for dinosaur evidence. This prehistoric coastal zone has now revealed unprecedented paleontological treasures.

    Cristiano Dal Sasso, paleontologist at Milan’s Natural History Museum, described the discovery as surpassing fantasy. Wildlife photographer Elio Della Ferrera initially contacted Dal Sasso after identifying the formations during a September expedition aimed at capturing deer and vultures.

    The impressions were created by long-necked bipedal herbivores measuring up to 10 meters (33 feet) in length and weighing approximately four tons—characteristics comparable to Plateosaurus specimens. Numerous tracks display 40-centimeter widths with clearly visible claw marks.

    Analysis of the patterns indicates social herd behavior, with dinosaurs moving collectively at deliberate paces without evidence of panic or rushing. Circular formations suggest periodic stopping points, potentially serving protective functions against predators.

    The remote discovery site poses significant accessibility challenges, situated 2,400-2,800 meters above sea level on a north-facing rock wall mostly shaded from sunlight. Della Ferrera noted the prints remained inconspicuous without powerful photographic equipment, requiring him to scale a vertical rock face for closer examination.

    Lombardy Regional Governor Attilio Fontana celebrated the find as an unexpected Olympic gift, though winter accessibility remains impractical. No immediate plans for public viewing have been established due to the extreme elevation and rugged terrain surrounding the prehistoric trackway.

  • Thousands of dinosaur footprints found on Italian mountain

    Thousands of dinosaur footprints found on Italian mountain

    A breathtaking paleontological discovery has emerged from Italy’s Stelvio National Park, where researchers have uncovered thousands of dinosaur footprints preserved for 210 million years. The extraordinary find, initially spotted by a photographer on a vertical mountain wall, reveals parallel rows of tracks up to 40 centimeters in diameter with remarkably preserved details of toes and claws.

    Scientific analysis indicates these impressions belong to prosauropods – long-necked herbivores that inhabited the region during the Triassic period when the area functioned as a tidal flat. This prehistoric landscape eventually became incorporated into the Alpine chain through geological processes. The trackway stretches hundreds of meters and presents one of the most complete records of dinosaur movement patterns from this era.

    Milan-based paleontologist Cristiano Dal Sasso expressed astonishment at the discovery, stating, ‘I never would have imagined encountering such a spectacular find in my own region. This location was teeming with dinosaurs; it represents an immense scientific treasure.’ The footprints demonstrate coordinated herd movement with evidence of complex social behaviors, including circular formations that potentially indicate defensive positioning.

    Notably, the discovery includes both bipedal locomotion patterns and occasional handprints, suggesting moments when the creatures paused to rest their forelimbs on the ground. The presence of smaller footprints indicates these herds included juvenile specimens, providing crucial insights into dinosaur family structures and development.

    The remote location, inaccessible by conventional paths, will require drone technology and remote sensing for comprehensive documentation. The Italian Ministry of Culture has emphasized the significance of this discovery occurring near the upcoming Winter Olympics venue, describing it as ‘history paying homage to the greatest global sporting event through a symbolic passing of the baton between nature and sport.’

    Photographer Elio Della Ferrera, who first documented the footprints, highlighted the philosophical implications: ‘This discovery should spark reflection about how little we truly understand the places we inhabit – our home, our planet.’ The findings promise to reshape scientific understanding of dinosaur migration patterns, social behavior, and Triassic ecosystem dynamics in what is now the Alpine region.

  • Scientists alter mast cells to fight cancerous tumors

    Scientists alter mast cells to fight cancerous tumors

    In a revolutionary approach to cancer treatment, researchers at Zhejiang University have successfully transformed mast cells—typically known for triggering allergic responses—into precision weapons against cancerous tumors. This innovative strategy merges targeted immune system activation with advanced drug delivery mechanisms.

    The research, published in the prestigious journal Cell, represents a collaboration between Professors Gu Zhen and Yu Jicheng of Zhejiang University and Professor Liu Fujian of China Medical University. Their work focuses on repurposing mast cells, a type of white blood cell traditionally associated with allergic reactions such as hay fever or food sensitivities, into specialized carriers for oncolytic viruses designed to eliminate cancer cells.

    The scientific breakthrough involves equipping mast cells with immunoglobulin E (IgE) antibodies specifically engineered to recognize unique protein markers on tumor cells. This biological reprogramming effectively converts these cells into precision-guided vehicles that seek out and infiltrate cancerous growths.

    Once these modified mast cells reach their target, they unleash their therapeutic payload through a controlled release mechanism reminiscent of an allergic reaction. This process delivers a concentrated dose of cancer-killing viruses directly to the tumor site while simultaneously activating additional immune defenses, including CD8+ T cells, to join the attack.

    In preclinical studies involving mouse models of melanoma, breast cancer, and metastatic lung cancer, the approach demonstrated significant tumor growth suppression and improved survival rates. Notably, in experiments using patient-derived tumor models with elevated HER2 protein levels (common in certain breast cancers), the treatment triggered robust immune responses and substantial tumor reduction.

    The platform’s adaptability allows for personalized cancer treatment by tailoring IgE antibodies to target patient-specific tumor proteins. Researchers suggest this mast cell technology could also be adapted to deliver other therapeutic agents, including small-molecule drugs or antibodies.

    The research team is currently advancing the technology toward clinical applications, focusing on optimizing production processes, selecting patient-specific IgE antibodies, and exploring combination therapies with existing immunotherapies.

  • La Nina conditions may hit rain, lead to drought

    La Nina conditions may hit rain, lead to drought

    Meteorological authorities warn that eastern and southern regions of China face heightened drought risks throughout winter and into spring 2026 due to persistent La Nina conditions in the equatorial Pacific. While climate experts confirm the unlikely development of a full-scale La Nina event, the existing oceanic cooling pattern continues to disrupt normal precipitation distribution across affected regions.

    The National Climate Center’s monitoring data indicates that La Nina conditions became established in October 2025, characterized by unusually cool sea surface temperatures across the central and eastern equatorial Pacific. According to Zhang Daquan, Deputy Director of the center’s climate prediction division, meteorologists utilize the Nino 3.4 index as the standard measurement for such phenomena, with values dropping below -0.5°C indicating La Nina conditions.

    Climate scientists emphasize the critical distinction between La Nina conditions and official La Nina events. The latter requires the Nino 3.4 index to remain below the -0.5°C threshold for five consecutive months—a duration not expected in the current scenario. Forecast models project the cooling pattern will persist for two to three months before transitioning toward neutral conditions around February or March 2026.

    The meteorological mechanism involves La Nina generating cyclonic circulation anomalies over the western North Pacific and South China Sea. This atmospheric configuration produces prevailing northeasterly winds that impede moisture transport from tropical regions—China’s primary winter vapor source. Consequently, precipitation deficits are anticipated across eastern and southern provinces.

    Contrary to public assumptions linking La Nina with severe winter cold, temperature projections indicate near-average or slightly above-average winter temperatures nationwide. Zhang clarified that multiple factors beyond La Nina—including Arctic sea ice coverage, Eurasian snow accumulation, and natural atmospheric variability—collectively influence China’s seasonal climate patterns.

    The National Climate Center anticipates increased temperature volatility throughout winter, featuring more pronounced alternations between cold spells and warm periods. This variability occurs alongside the predicted precipitation reduction, creating complex weather challenges for agricultural and water resource management sectors.